views: implement dialog width snapping

chrome/browser/ui/views/chrome_views_delegate.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/chrome_views_delegate.h"
 
 #include <memory>
 
 #include "base/logging.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 240 matching lines @@
           LayoutDelegate::Metric::RELATED_CONTROL_HORIZONTAL_SPACING);
     case views::DistanceMetric::RELATED_CONTROL_VERTICAL:
       return LayoutDelegate::Get()->GetMetric(
           LayoutDelegate::Metric::RELATED_CONTROL_VERTICAL_SPACING);
     case views::DistanceMetric::DIALOG_BUTTON_MINIMUM_WIDTH:
       return LayoutDelegate::Get()->GetMetric(
           LayoutDelegate::Metric::DIALOG_BUTTON_MINIMUM_WIDTH);
     case views::DistanceMetric::BUTTON_HORIZONTAL_PADDING:
       return LayoutDelegate::Get()->GetMetric(
           LayoutDelegate::Metric::BUTTON_HORIZONTAL_PADDING);
+    case views::DistanceMetric::DIALOG_WIDTH_SNAPPING_UNIT:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::DIALOG_WIDTH_SNAPPING_UNIT);
   }
   NOTREACHED();
   return 0;
 }
 
 int ChromeViewsDelegate::GetDefaultDistanceMetric(
     views::DistanceMetric metric) const {
   return views::ViewsDelegate::GetDistanceMetric(metric);
 }
 
 #if !defined(OS_CHROMEOS)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(
     const views::Widget::InitParams& params) {
   return views::Widget::InitParams::OPAQUE_WINDOW;
 }
 #endif